<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!--卡片视图区域-->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input
            placeholder="请输入内容"
            v-model="queryInfo.query"
            clearable
            @clear="getGoodsList"
          >
            <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
          </el-input>
        </el-col>

        <el-col :span="4">
          <el-button type="primary" @click="goAddpage">添加商品</el-button>
        </el-col>
      </el-row>

      <!--渲染用户列表-->
      <el-table :data="goodsList" border stripe>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column prop="goods_name" label="商品名称" ></el-table-column>
        <el-table-column prop="goods_price" label="商品价格(元)"  width="95px"></el-table-column>
        <el-table-column prop="goods_weight" label="商品重量" width="70px"></el-table-column>
        <el-table-column prop="add_time" label="创建时间" width="166px">
          <template slot-scope="scope">
             {{scope.row.add_time | dateFormat}}
          </template>
        </el-table-column>
        <el-table-column label="操作" width="150px">
          <template slot-scope="scope">
            <!--修改按钮-->
            <el-button type="primary" icon="el-icon-edit" size="mini"></el-button>
            <!--删除按钮-->
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeGoodsById(scope.row.goods_id)"></el-button>
          </template>
        </el-table-column>
      </el-table>

      <!--页码-->
      <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="queryInfo.pagenum"
      :page-sizes="[5, 10, 15, 20]"
      :page-size="queryInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total">
    </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      queryInfo: {
        //搜索栏内数据
        query: "",
        //当前页码
        pagenum: 1,
        //页码大小
        pagesize: 5,
      },
      goodsList: [],
      //总数据条数
      total: 0,
    };
  },

  created() {
    this.getGoodsList();
  },

  methods: {
    async getGoodsList() {
      const { data: res } = await this.$http.get("goods", {
        params: this.queryInfo,
      });
      if (res.meta.status != 200)
        return this.$message.error("获取商品数据失败!");
      this.goodsList = res.data.goods;
      this.total = res.data.total;
    },

    //监听 pagesize改变的事件
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    
    //监听页码值改变的事件
    handleCurrentChange(newSize) {
      this.queryInfo.pagenum = newSize
      this.getGoodsList()
    },

    //根据ID删除对应的商品
    async removeGoodsById(id) {
      //先弹框询问用户是否删除
         const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        //如果用户确认删除，则返回值为confirm
        //如果用户取消了删除，则返回值为字符串cancel
        //console.log(confirmResult)
        if(confirmResult != 'confirm'){
          return this.$message.info('已取消删除！')
        }
        const {data: res} = await this.$http.delete("goods/" + id)
        if(res.meta.status != 200) return this.$message.error("删除失败！")
        this.$message.success("删除成功!")
        this.getGoodsList()
    },

    //点击添加按钮，跳转到添加商品页面
    goAddpage() {
        this.$router.push('/goods/add')
    }
  },
};
</script>

<style lang="less" scoped>
</style>